make very loud simple powerful alarm using dc motor life hacks Canada is about to discover Mark Carney is the man with the reverse Midas touch Trump says a transition period for the economy is ...

[BlackCow] came up with a simple solution to this problem. The circuit is fairly rudimentary but a great example of using the basics to get the job done. Now, instead of having an alarm that ...

There’s no audible alarm; rather, an LED blinks to indicate an unauthorized intrusion and blinks once for every 15 minutes since the event. LightSafer is simple but effective, with a clever UI ...

A burglar alarm, also known as a security alarm, is a simple electric circuit that is designed to trigger an alarm in the ...

Don’t forget the switch – we’ll set it up so if someone treads on it, the switch will close, setting off our alarm! Practise drawing the following series circuits using symbols: A simple ...